867638420 has 48 divisors (see below), whose sum is σ = 2092305600. Its totient is φ = 298897920.

The previous prime is 867638413. The next prime is 867638491. The reversal of 867638420 is 24836768.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99605 + ... + 107964.

It is an arithmetic number, because the mean of its divisors is an integer number (43589700).

Almost surely, 2^867638420 is an apocalyptic number.

It is an amenable number.

867638420 is an abundant number, since it is smaller than the sum of its proper divisors (1224667180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

867638420 is a wasteful number, since it uses less digits than its factorization.

867638420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207608 (or 207606 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 44.

The square root of 867638420 is about 29455.7026736759. The cubic root of 867638420 is about 953.7757106553.

The spelling of 867638420 in words is "eight hundred sixty-seven million, six hundred thirty-eight thousand, four hundred twenty".